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УДК: 537.9
Optical transitions in a complex valence band of semiconductor nanocrystals
Full text «Opticheskii Zhurnal»
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Publication in Journal of Optical Technology
Турков В.К., Леонов М.Ю., Рухленко И.Д., Баранов А.В., Фёдоров А.В. Оптические переходы в сложной валентной зоне полупроводниковых нанокристаллов // Оптический журнал. 2015. Т. 82. № 11. С. 36–42.
Turkov V.K., Leonov M.Yu., Rukhlenko I.D., Baranov A.V., Fedorov A.V. Optical transitions in a complex valence band of semiconductor nanocrystals [in Russian] // Opticheskii Zhurnal. 2015. V. 82. № 11. P. 36–42.
V. K. Turkov, M. Yu. Leonov, A. V. Baranov, A. V. Fedorov, and I. D. Rukhlenko, "Optical transitions in a complex valence band of semiconductor nanocrystals," Journal of Optical Technology. 82(11), 743-748 (2015). https://doi.org/10.1364/JOT.82.000743
Intraband optical transitions in the complex valence band of spherical nanocrystals based on semiconductors with Td and Oh symmetries have been studied. The energy spectrum of the holes is calculated, using k·p perturbation theory. Analytical expressions are obtained for the hole–photon-interaction matrix elements. It is shown that the size dependence of these matrix elements is determined by the states that participate in the transitions. The selection rules obtained here permit transitions between a large number of states with various symmetries that are forbidden in the conduction zone. The radiative lifetime of the states in the valence band are computed as a function of the radius of the nanocrystal, and it is shown that it can vary in a wide range from 10−12 to 10−3 s.
quantum dots, band theory, intraband absorption, radiative lifetime
Acknowledgements:This work was carried out with the financial support of the Ministry of Education and Science of the Russian Federation (Grant 14.B25.31.0002 and State Job No. 3.17.2014/K). The Ministry of Education and Science of the Russian Federation is also supporting M. Yu. Leonov by means of a stipend of the President of the Russian Federation for young scientists and graduate students (2013–15).
OCIS codes: 160.4236, 300.6500
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